Photospheric line asymmetry and granular velocity models

Details Photospheric line asymmetry and granular velocity models Photospheric line asymmetry and granular velocity models

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69..213k&link_type=abstract

Solar Physics, vol. 69, Feb. 1981, p. 213-221.

Physics

10

Asymmetry, Line Spectra, Solar Granulation, Velocity Distribution, Solar Physics, Spatial Resolution

Scientific paper

Spectral line profiles obtained from regions of the solar surface exhibiting either an upflow or a downflow on a spatial and temporal scale corresponding to the white-light granulation are analyzed. The differences between their line bisectors are measured to quantify changes in the asymmetry of the profile resulting from granular motion. The observed bisector differences are compared with differences predicted using conflicting granular models. Models in which the motion of large, long-lived granules decreases rapidly with increasing height in the photosphere are compatible with the observed line profile asymmetries.

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